alkene

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alkene

(ăl`kēn), any of a group of aliphatic hydrocarbons whose molecules contain one or more carbon-carbon double bonds (see chemical bondchemical bond,
mechanism whereby atoms combine to form molecules. There is a chemical bond between two atoms or groups of atoms when the forces acting between them are strong enough to lead to the formation of an aggregate with sufficient stability to be regarded as an
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). Alkenes with only one double bond have the general formula CnH2n. In the International Union of Pure and Applied Chemistry (IUPAC) system of chemical nomenclature, the name of an alkene is derived from the name of the corresponding alkanealkane
, any of a group of aliphatic hydrocarbons whose molecules contain only single bonds (see chemical bond). Alkanes have the general chemical formula CnH2n+2.
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 by replacing the -ane alkane suffix with -ene and, if necessary, adding a prefix to indicate the location of the double bond in the molecule. The IUPAC name of the simplest alkene, H2C=CH2, is ethene, which is derived from ethane. Propene is related to propane. Two alkenes, 1-butene and 2-butene, are related to butane; these two compounds, which differ in the location of the double bond in their molecules, are structural isomersisomer
, in chemistry, one of two or more compounds having the same molecular formula but different structures (arrangements of atoms in the molecule). Isomerism is the occurrence of such compounds. Isomerism was first recognized by J. J. Berzelius in 1827.
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. In addition to these IUPAC names, many of the alkenes have common names, e.g., ethene is called ethylene and propene propylene. The alkenes as a group are sometimes called the ethylene series. Since the carbon-carbon double bond is sometimes called an olefinic linkage, the alkenes are sometimes called the olefins. Many of the reactions in which alkenes take part involve the cleavage of half the carbon-carbon double bond and subsequent formation of two single bonds, one to each of the adjacent carbon atoms. Such reactions include hydrogenation, with the formation of an alkane, and hydration, with the formation of an alcohol.

alkene

[′al‚kēn]
(organic chemistry)
One of a class of unsaturated aliphatic hydrocarbons containing one or more carbon-to-carbon double bonds.

alkene

a. any unsaturated aliphatic hydrocarbon with the general formula CnH2n
b. (as modifier): alkene series
References in periodicals archive ?
It should be noted here that, although the number of unsaturation of VTMS is less than that of TAIC, the cross-linking efficiency of PCL with 5 wt% VTMS is very similar to that of PCL with 5 wt% TAIC, which may come from the fact that it is difficult for VTMS to homopolymerize in radical cross-linking reaction because of the bulky side group [16]; hence, most of carbon-carbon double bonds of VTMS are active under radiation to experience cross-linking reaction between PCL chains.
Osmium/Cinchona alkaloids catalyzed asymmetric dihydroxylation and asymmetric aminohydroxylation of carbon-carbon double bonds
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Key statement: A crosslinkable and crosslinked organosilicon polymer which is prepared from a mixture of a reactive polysiloxane resin having both reactive carbon-carbon double bonds and silicone-hydrogen groups, characterized by alternating structures of polycyclic polyene residue and cyclic (or tetrahedral) polysiloxane residue, and either vinyl terminated fluorine-containing polysiloxane or vinyl terminated phenyl-substituted siloxane.
The book is divided into five sections that deal with selectivity, carbon-carbon single bonds, carbon-carbon double bonds, stereochemistry and functional group strategy.